An impure sample of sodium oxalate `(na_2C_2O_4)` weighing `0.2g` is dissolved in aqueous solution of `H_2SO_4` and solution is titrated at `70^@C,` requiring `45mL` of `0.02 MKMnO_4` solution. The end point is overrun, and back titration in carried out with `10mL` of `0.1M` oxalic acid solution. Find the % purity of `Na_2C_2O_4` in sample :

An impure sample of sodium oxalate (Na_(2)C_(2)O_(4) weighing 0.20 g is dissolved in aqueous solution of H_(2)SO_4) and solution is titrated at 70^(@)C ,requiring 45 mL of 0.02 M KMnO_(4) solution. The end point is overrun, and back titration in carried out with 10 mL of 0.1 M oxalic acid solution. Find the purity of Na_(2)C_(2)O_(4) in sample: (a)75 (b)83.75 (c)90.25 (d)None of these

20 ml of 0.02 M KMnO_4 was required to completely oxidise 10 ml of oxalic acid solution. What is the molarity of the oxalic acid solution ?

A sample of Na_(2)CO_(3).H_(2)O weighing 0.62 g is added to 10 ml of 0.1 N H_(2)SO_(4) solution . The resulting solution will be

A sample of Na_2CO_3H_2O weighing 0.62 g is added to 100 mL of 0.1 N H_2SO_4 . Will the resulting solution be acidic, basic or neutral ?

Volume of 0.1 M H_2SO_4 solution required to neutralize 40 ml of 0.2 M NaOH solution is :

Volume of 0.1 M H_2SO_4 solution required to neutralize 10 ml of 0.2 M NaOH solution is :

Volume of 0.1 M H_2SO_4 solution required to neutralize 20 ml of 0.2 M NaOH solution is :

20mL of 0.2MNaOH(aq) solution is mixed with 35mL of 0.1MNaOH(aq) solution and the resultant solution is diluted to 100mL. 40mL of this diluted solution reacted with 10% impure sample of oxalic acid (H_2C_2O_4) . The mass impure sample is :

If 1.34g Na_(2)C_(2)O_(4) is dissolved in 500 mL of water and this solution is titrated with M/10 KMnO_(4) solution in acidic medium, the volume of KMnO_(4) used is :

0.7g of (NH_(4))_(2)SO_(4) sample was boiled with 100mL of 0.2 N NaOH solution was diluted to 250 ml. 25mL of this solution was neutralised using 10mL of a 0.1 N H_(2)SO_(4) solution. The percentage purity of the (NH_(4))_(2)SO_(4) sample is :